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RBD Replay is a set of tools for capturing and replaying Rados Block Device
(RBD) workloads. To capture an RBD workload, lttng-tools must be installed
on the client, and librbd on the client must be the v0.87 (Giant) release
or later. To replay an RBD workload, librbd on the client must be the Giant
release or later.

Replay the trace with rbd-replay. Use read-only until you know
it’s doing what you want:

rbd-replay--read-onlyreplay.bin

Important

rbd-replay will destroy data by default. Do not use against
an image you wish to keep, unless you use the --read-only option.

The replayed workload does not have to be against the same RBD image or even the
same cluster as the captured workload. To account for differences, you may need
to use the --pool and --map-image options of rbd-replay.